Service Manual: Table of Contents

Product Overview

This comprehensive service manual is designed to assist in understanding, maintaining, and troubleshooting your machinery. It provides detailed instructions for each section, ensuring that you are well-equipped to handle your equipment with care and expertise.

Table of Contents

1. Index
2. Specification
3. Maintenance
4. System
5. Disassembling
6. Troubleshooting
7. E/G

Manual Extract: Slew Operating Circuit

Pilot Oil Hydraulic System

This section explains the operation of the pilot oil hydraulic system with an emphasis on the operating lever.

22.3.4.1 Slew (Left) Operating Circuit

Pilot Circuit

When operating the slew (left), the pilot secondary pressure oil is generated from the pilot valve and directed to the control valve to shift the slew valve spool.

Main Circuit

• Supply Circuit for Slewing Motor: Oil from the hydraulic oil pump is supplied to the slewing motor via the control valve to drive the motor.
• Slewing Motor Features:
  • The relief valve quickly relieves pressure spikes at start and stop to minimize shock.
  • The make-up valve replenishes oil from the return circuit to prevent cavitation in the slewing motor, ensuring smooth operation.